Half to frederic g



(No Model.)

1 2 Sheets-Sheet 1.

A. J. ROSENTRETER.

AUTOMATIG CAR BRAKE.

No. 450,300. Patented Apr. 14,1891.

(No Model.) 2 sheets-sheen 2.

A. J.'ROSENTRETER.

AUTOMATIC GAR BRAKE.

No. 450,300. atented Apr. 14,1891.

UNITED STATES ALBERT J. ROSENTRETER, OF ROCHESTER, NE\V YORK, ASSIGNOR OF ONE- HALF TO FREDERIO G. KIMMAN, OF SAME PLACE.

AUTOMATIC CAR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 450,300, dated April 14, 1891.

Application filed January 9, 1891. Serial No. 377,288. (No model.)

To all whom it may concern:

Be it known that I, ALBERT J. RosENraE- TER, of Rochester, in the county of hlonroe description of the sam e, reference being bad to the drawings accompanying this specification. to My improvement relates to automatic carbrakes of that kind where each car of a train is provided with a bar or rod extending its whole length and provided with draw-heads at the ends, the arrangement being'such that the retarding of anyone car will cause the bars of all the cars in the rear to abut and automatically apply the brakes.

The invention consists in the construct-i0 and arrangement of parts hereinafter described, whereby the bars can be made to apply the brakes automatically going in either direction.

In the drawings, Figure 1 is a bottom or under side view of one car and the connect- 2 5 ing end of the next car in advance exhibiting my invention. Fig. 2 is a longitudinal Vertical section of the same right side up in line a: a: of Fig. 1. Fig. 8 is an enlarged side elevation of the central portion of the rear 0 car shown in Figs. 1 and 2.

A A indicate two connecting cars of a railway-train, and B B the supporting-wheels of usual construction.

C O are long bars or rods on the under side 3 5 of the cars, each extending the whole length of the car and provided at its ends with drawheads 0 C, which project in the usual way.

The draw-heads are made separate from the bars and fitted in the ends thereof, and may be provided with springs in the usual way to lessen shock when they strike together.

D D are the brakes, consisting of cross-bars a a and friction-shoes b b of usual form.

These are suspended in the ordinary way from the under side of the car-body by hangers c c, which support the brakes and allow them to swing forward and back. At the upper end, however, these suspension-rods are attached to crank-arms d d, which allow the brakes to rise and fall, the purpose of which will be presently explained.

The brakes are in pairs and are applied on the outer sides of the wheels of each truck, as usual.

E E are rock-levers, pivoted to the brakebars a a at opposite ends of the car, the tops of said levers being connected by a long tierod F, which extends the whole length of the car. G G are similar rock-levers pivoted to the inner brake-bars a a. The bottoms of each pair of these rock-levers E G and E G are connected by short rods H H, which extend the length of each truck.

I I are straps or loops attached to theunder side of the bar 0. Each of these loops consists of two horizontal lengthsf f and g g at different heights and an intermediate bend h, forming a stop or shoulder. The upper ends of the rock-levers G G are provided with rollers 7t- 7a, which rest inside the loops, as shown in Fig. 7c

The operation is as follows: The strain on bar 0, when the train is in motion, draws it forward in its bearingsjj till the rear drawhead strikes. In this condition the roller 7; on the rear inner rock-lever G rests on the lower level f of the loop I and against the shoulder 7L, as shown at the leftin Fig. 3. At the same time the other roller k of the rocklever G rests on the upperlevel g of the loop I and free of the shoulder 72/. If now the car in advance is retarded, the ends of the contiguous draw-heads strike and force the bar 0 back, carrying with it the shoulder h and the top of the rock-lever G. This action draws on rod H and the leverage brings the two brakes on the rear truck in contact with the wheels. The same action throws the upper end of rock-lever E backward, consequently drawing on the long rod F and the upper end of the lever E at the front end of 0 the car. This in turn draws on the connecting-rod H and brings both brakes on the front truck in contact with the wheels. The brakes on both trucks are actuated simultaneously by reason of the shoulder h resting 5 against the roller 76. It should be stated that in this position the roller k rests against a pin on or some other stop to prevent back action when the leverage is applied. The crank-arms d d are for the purpose of allow- Ioo ing the brakes to rise and fall as the rollers k it pass from one height to another in the against the shoulder h and the roller 70 elevated and freed from the shoulder h. This is indicated by the dotted lines in Fig. The parts Work in the same manner, but reversely. The device is therefore double-acting and capable of Working in both directions, the action being produced by the sliding of bar 0 by the strain when motion is given to the train.

It is obvious that instead of the stiff bar such as is shown at O, a simple rod might be used connecting the ordinary draw-heads of a car with a similar result.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In an automatic carbrake, the combination of the sliding bar 0, the loops I I, provided with the shoulders h h and bearings ff g g at different levels, the brakes D D, one pair to each truck, suspended from the carbody, the levers E E and G G, pivoted to the brake-bars, the rod F, connecting the tops of the extreme levers, the rods H H, connecting the bottoms of each pair of levers E Gand E G, and the rollers 70 is, attached to the tops of the levers G G and resting in the loops I I, as shown and described, and for the purpose specified.

2. In an automatic car-brake, the combination, with the sliding bar Oand rock-lever G, pivoted tothe brake, of the loop I, attached to the under side of the bar, provided With the shoulder h, and the bearings f f, standing at diiferent levels, and the roller is, attached to the rock-lever and resting Within the loop, as shown and described, and for the purpose specified.

In Witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

ALBERT J. ROS ENTRETER.

Witnesses:

R. F. Oseoon, WYM. J. McPHERsoN. 

